US4715518A - Dispenser for striped viscous products - Google Patents

Dispenser for striped viscous products Download PDF

Info

Publication number
US4715518A
US4715518A US06/926,853 US92685386A US4715518A US 4715518 A US4715518 A US 4715518A US 92685386 A US92685386 A US 92685386A US 4715518 A US4715518 A US 4715518A
Authority
US
United States
Prior art keywords
piston
product
pumping piston
pumping
spout
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/926,853
Inventor
David G. Moore
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Silgan Dispensing Systems Corp
Original Assignee
Realex Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Realex Corp filed Critical Realex Corp
Priority to US06/926,853 priority Critical patent/US4715518A/en
Application granted granted Critical
Publication of US4715518A publication Critical patent/US4715518A/en
Assigned to CALMAR INC., A CORP. OF DE reassignment CALMAR INC., A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: REALEX CORPORATION
Assigned to CALMAR INC., A DE CORP. reassignment CALMAR INC., A DE CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: REALEX CORPORATION
Assigned to CITICORP NORTH AMERICA, INC., AS AGENT reassignment CITICORP NORTH AMERICA, INC., AS AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CALMAR INC.
Assigned to UNITED STATES TRUST COMPANY OF NEW YORK reassignment UNITED STATES TRUST COMPANY OF NEW YORK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CALMAR INC.
Assigned to CALMAR INC., A CORPORATION OF DELAWARE reassignment CALMAR INC., A CORPORATION OF DELAWARE RELEASE BY SECURED PARTY OF A SECURITY AGREEMENT RECORDED AT REEL 5020 FRAME 0974 AND DATED 12-08-88 Assignors: CITICORP NORTH AMERICA, INC.
Assigned to CALMAR INC., A DE CORP. reassignment CALMAR INC., A DE CORP. TERMINATION AND RELEASE OF INTELLECTUAL PROPERTY PLEDGE AGREEMENT Assignors: UNITED STATES TRUST COMPANY OF NEW YORK, AS COLLATERAL AGENT
Assigned to MELLON BANK, N.A., AS COLLATERAL AGENT reassignment MELLON BANK, N.A., AS COLLATERAL AGENT PATENT COLLATERAL SECURITY AGREEMENT Assignors: CALMAR INC., A DELAWARE CORPORATION
Assigned to BANQUE INDOSUEZ, AS COLLATERAL AGENT reassignment BANQUE INDOSUEZ, AS COLLATERAL AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MELLON BANK, N.A., AS COLLATERAL AGENT
Assigned to CALMAR, INC. reassignment CALMAR, INC. TERMINATION OF PATENT SECURITY INTERESTS Assignors: BANQUE INDOSUEZ, AS COLLATERAL AGENT
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D35/00Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor
    • B65D35/24Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor with auxiliary devices
    • B65D35/242Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor with auxiliary devices for mixing or discharging of two or more components
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00Containers or packages with special means for dispensing contents
    • B65D83/0005Containers or packages provided with a piston or with a movable bottom or partition having approximately the same section as the container
    • B65D83/0033Containers or packages provided with a piston or with a movable bottom or partition having approximately the same section as the container the piston being a follower-piston and the dispensing means comprising a hand-operated pressure-device at the opposite part of the container

Definitions

  • This invention relates to the field of manually operated pumping dispensers and, more particularly to improvements in dispensers of the type which are especially adapted for handling viscous products such as striped toothpaste and the like.
  • a dispenser for pastry products of the subject type is illustrated in prior U.S. patent application Ser. No. 565,540, filed Dec. 27, 1983, in the names of John M. B. Ford, et al., and titled "PASTRY PRODUCT DISPENSER HAVING COMBINATION ACTUATOR AND OUTLET VALVE" owned by the assignee of the present invention, and now U.S. Pat. No. 4,691,847.
  • one important object of the present invention is to provide a dispenser that is especially, although not exclusively, suited for dispensing a viscous, axially striped product by virtue of the dispenser's ability to pump the product under pressure without destroying or otherwise adversely affecting the integrity and clear definition of the stripes throughout the product.
  • the reciprocable pumping piston of the dispenser is provided with a product engaging face that is concave in nature so as to gently guide the product in a laminar flow into the centrally disposed outlet passage associated with the piston during the pumping stroke.
  • the avoidance of turbulence, agitation and sharp directional changes in the product as it subjected to pumping pressures has been found to be especially beneficial in preserving the integrity of the stripes.
  • constructing the pumping piston in a manner to achieve such results has also led to a decrease in the finger pressure required to manually effect a pumping stroke and to a decrease in any deformation of the piston face which could otherwise lead to undesirable product blow-by around the sealing interface between the piston and the walls of the pumping chamber.
  • FIG. 1 is a vertical cross-sectional view of a dispenser constructed in accordance with the principles of the present invention with the actuating lever thereof in its undepressed, standby position and the spout outlet closed by the valve portion of the lever;
  • FIG. 2 is a vertical cross-sectional view of the dispenser similar to FIG. 1 but showing the dispenser filled with a striped product and the actuating lever depressed.
  • FIGS. 1 and 2 show a dispenser 10 having a tubular cylindrical body 12 which is open at its lower end 14 to the atmosphere, except for the presence of a floating piston 16 which makes sealing engagement with the interior wall surface of the body 12 and has a downwardly and outwardly flaring metal skirt 18 or the like on the bottom side thereof which also engages the interior wall surface of the body 12.
  • the skirt 18 is sufficiently resilient that it will deflect downwardly to any extent necessary to permit the piston 16 to move upwardly in the body 12 yet is sufficiently stiff as to bite into the wall surface and prevent downward, retrograde movement of the piston 16 within the body 12.
  • the opposite upper end 20 of the body 12 includes an upright, centrally disposed, reduced-diameter sleeve 22 which is supported by transversely extending web means 24.
  • the sleeve 22 reciprocably receives the tubular stem 26 of a pumping piston 28 which at its circumferential periphery sealingly engages the inner wall surface of the body 12.
  • a passage 30 is defined within the tubular stem 16, and the two pistons 16 and 28 cooperate with the body 12 to form a pumping chamber 32 therebetween.
  • the sleeve 22 also partially receives the lower end of a tubular discharge spout 34 which itself receives the upper end of the plunger stem 26 and is securely attached thereto.
  • a passage 36 is defined within the tubular spout 34, and a discharge outlet 38 is presented at the uppermost end thereof.
  • a coil spring 40 encircles the piston stem 26 and is trapped between the lower extremity of the spout 34 and a lower, inturned terminus 42 of the sleeve 22 for the purpose of yieldably biasing the piston 28 and the spout 34 toward an upper, undepressed position as illustrated in FIG. 1.
  • the dispenser 10 is also provided with an actuator 46 in the form of a lever having a fulcrum 48 associated with the spout 34.
  • the fulcrum 48 takes the form of a pair of pins projecting laterally from opposite sides of the spout 34, and a pair of legs 50 of the actuator 46 (only one leg 50 being illustrated) straddle the spout 34 and rest at their midpoints on the respective fulcrum pins 48. Forwardmost ends of the legs 50 are retainingly hooked beneath overhanging proximal ledges 52 (only one being shown) on upstanding housing structure 54 at the upper end 20 of the body 12.
  • the actuator lever 46 includes a finger-engaging portion 56 on one side of the fulcrum pins 48, as well as a valve flap portion 58 on the opposite side of the fulcrum pins 48.
  • the valve portion 58 is integrally connected with the finger-engaging portion 56 by an intermediate web portion 60, and it will be noted that the valve portion 58 is of such a dimension as to completely cover and thereby close the outlet 38 when the actuator 46 is in its FIG. 1 position.
  • the spout 34 may have an angled upper end as shown in order to best accommodate the valve portion 58 and a web portion 60 of actuating lever 46.
  • the pumping piston 28 has a lower, product-engaging face 44 which is of smoothly arcuate, concave configuration. It is to be noted that although the face 44 is arcuate in the illustrated embodiment, it is also within the concepts of the present invention to provide such face 44 with sloping flat surfaces that converge toward the passage 30. The number of such sloping surfaces is largely discretionary.
  • the lower takeup piston 16 is provided with an upper, product engaging face 17 that is of smoothly arcuate, convex configuration complemental to that of the face 44 of pumping piston 28.
  • face 17 has been disclosed herein as being smoothly arcuate, it is within the scope of the present invention to achieve its convex configuration through sloping flat surfaces or the like, although it is preferred that, in any event, the face 17 be configured in a corresponding and complemental way with respect to the face 44.
  • the return spring 40 normally maintains the pumping piston 28, the spout 34, and the actuator 46 in the position of FIG. 1 in which the valve flap 58 tightly covers and seals the outlet 38.
  • the operating portion 56 of the actuator 46 Upon the application of downwardly directed finger pressure to the operating portion 56 of the actuator 46, the latter rocks downwardly about the fulcrum pins 48 in a clockwise direction so that the valve flap 58 is lifted off the outlet 38 in substantially the same manner as illustrated in FIG. 2.
  • depression of the operating portion 56 also causes the spout 34 and hence the pumping piston 28 to be shifted downwardly a short distance. This exerts a positive pumping pressure on the product contained within the chamber 32, forcing the same upwardly through the passages 30 and 36 and out the outlet 38.
  • the floating piston 16 is caused to be moved upwardly within the chamber 32 by a corresponding amount as atmospheric pressure is applied against the bottom of the piston 16 by the open lower end 14 of the body 12.
  • the gently arcuate, concave face 44 of the pumping piston 28 has the effect of easing the transfer of product from within the pumping chamber 32 to the spout 34.
  • the pumping face of the piston is normal to the path of travel of product therethrough and the product must therefore be converged centrally and turned sharply and abruptly at right angles
  • downward movement of the pumping piston 28 tends to deflect or guide the product gently inwardly while at the same time pressing downwardly to force the product up through the passage 30.
  • the concave configuration of the piston face 44 reduces the finger pressure required to depress the piston 28.
  • Helpful in this regard is the lack of turbulence and agitation involved during the pumping action, all of which enhances the ease with which the piston 28 may be depressed.
  • the convex configuration of the takeup piston 16 assures that as the latter approaches the upper limits of its travel, the face 17 thereof will be complementally received by the concavity of the pumping piston 28. Consequently, evacuation of the product within chamber 32 is maximized, there being no remaining space for entrapment of product residue between the complemental faces 44 and 17 once the takeup piston 16 has fully risen into engagement with the piston 28.

Abstract

In a manually operated dispenser especially suited for striped toothpaste products and the like the reciprocable pumping piston is provided with a concave, product-engaging face that gently, yet forcibly, directs the product in a smooth, laminar flow out of the pump chamber and into the discharge spout when the piston is depressed through a pumping stroke so that stripes in the ribbon of toothpaste issuing from the spout are well defined and maintained in an aesthetically pleasing manner. The cooperating floating takeup piston at the opposite end of the chamber from the pumping piston is provided with a convex dome that becomes complementally received within the concavity of the pumping piston when the contents of the dispenser are nearly depleted, thereby maximizing the degree to which the dispenser is emptied.

Description

This application is a continuation of application Ser. No. 631,258 filed July 16, 1984, now abandoned.
TECHNICAL FIELD
This invention relates to the field of manually operated pumping dispensers and, more particularly to improvements in dispensers of the type which are especially adapted for handling viscous products such as striped toothpaste and the like.
BACKGROUND
A dispenser for pastry products of the subject type is illustrated in prior U.S. patent application Ser. No. 565,540, filed Dec. 27, 1983, in the names of John M. B. Ford, et al., and titled "PASTRY PRODUCT DISPENSER HAVING COMBINATION ACTUATOR AND OUTLET VALVE" owned by the assignee of the present invention, and now U.S. Pat. No. 4,691,847. While the principles disclosed and claimed in such prior application are sound and dispensers constructed in accordance with those teachings have performed quite well for their intended purposes, further improvements have now been discovered which make dispensers of that type especially well suited for striped toothpaste products and the like where preserving the integrity and clear definition of the stripes within the dispensed bead of toothpaste is extremely important for aesthetic, user appeal reasons.
SUMMARY OF THE PRESENT INVENTION
Accordingly, one important object of the present invention is to provide a dispenser that is especially, although not exclusively, suited for dispensing a viscous, axially striped product by virtue of the dispenser's ability to pump the product under pressure without destroying or otherwise adversely affecting the integrity and clear definition of the stripes throughout the product.
To this end, the reciprocable pumping piston of the dispenser is provided with a product engaging face that is concave in nature so as to gently guide the product in a laminar flow into the centrally disposed outlet passage associated with the piston during the pumping stroke. The avoidance of turbulence, agitation and sharp directional changes in the product as it subjected to pumping pressures has been found to be especially beneficial in preserving the integrity of the stripes. Moreover, constructing the pumping piston in a manner to achieve such results has also led to a decrease in the finger pressure required to manually effect a pumping stroke and to a decrease in any deformation of the piston face which could otherwise lead to undesirable product blow-by around the sealing interface between the piston and the walls of the pumping chamber.
As a result of the concave piston face, it has also been found desirable to provide the lower takeup piston of the dispenser with a convex product engaging face complemental to the face of the pumping piston. This results in several benefits including, for example, maximizing the degree of evacuation of product from the pump chamber as the convex face becomes received and nested within the concave face of the pumping piston upon full depletion of the product, and improved sealing around the interface between the takeup piston and the walls of the chamber.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a vertical cross-sectional view of a dispenser constructed in accordance with the principles of the present invention with the actuating lever thereof in its undepressed, standby position and the spout outlet closed by the valve portion of the lever; and
FIG. 2 is a vertical cross-sectional view of the dispenser similar to FIG. 1 but showing the dispenser filled with a striped product and the actuating lever depressed.
DESCRIPTION OF THE PREFERRED EMBODIMENT
FIGS. 1 and 2 show a dispenser 10 having a tubular cylindrical body 12 which is open at its lower end 14 to the atmosphere, except for the presence of a floating piston 16 which makes sealing engagement with the interior wall surface of the body 12 and has a downwardly and outwardly flaring metal skirt 18 or the like on the bottom side thereof which also engages the interior wall surface of the body 12. The skirt 18 is sufficiently resilient that it will deflect downwardly to any extent necessary to permit the piston 16 to move upwardly in the body 12 yet is sufficiently stiff as to bite into the wall surface and prevent downward, retrograde movement of the piston 16 within the body 12. The opposite upper end 20 of the body 12 includes an upright, centrally disposed, reduced-diameter sleeve 22 which is supported by transversely extending web means 24.
The sleeve 22 reciprocably receives the tubular stem 26 of a pumping piston 28 which at its circumferential periphery sealingly engages the inner wall surface of the body 12. A passage 30 is defined within the tubular stem 16, and the two pistons 16 and 28 cooperate with the body 12 to form a pumping chamber 32 therebetween.
The sleeve 22 also partially receives the lower end of a tubular discharge spout 34 which itself receives the upper end of the plunger stem 26 and is securely attached thereto. A passage 36 is defined within the tubular spout 34, and a discharge outlet 38 is presented at the uppermost end thereof. A coil spring 40 encircles the piston stem 26 and is trapped between the lower extremity of the spout 34 and a lower, inturned terminus 42 of the sleeve 22 for the purpose of yieldably biasing the piston 28 and the spout 34 toward an upper, undepressed position as illustrated in FIG. 1.
The dispenser 10 is also provided with an actuator 46 in the form of a lever having a fulcrum 48 associated with the spout 34. The fulcrum 48 takes the form of a pair of pins projecting laterally from opposite sides of the spout 34, and a pair of legs 50 of the actuator 46 (only one leg 50 being illustrated) straddle the spout 34 and rest at their midpoints on the respective fulcrum pins 48. Forwardmost ends of the legs 50 are retainingly hooked beneath overhanging proximal ledges 52 (only one being shown) on upstanding housing structure 54 at the upper end 20 of the body 12.
The actuator lever 46 includes a finger-engaging portion 56 on one side of the fulcrum pins 48, as well as a valve flap portion 58 on the opposite side of the fulcrum pins 48. The valve portion 58 is integrally connected with the finger-engaging portion 56 by an intermediate web portion 60, and it will be noted that the valve portion 58 is of such a dimension as to completely cover and thereby close the outlet 38 when the actuator 46 is in its FIG. 1 position. If desired, the spout 34 may have an angled upper end as shown in order to best accommodate the valve portion 58 and a web portion 60 of actuating lever 46.
The pumping piston 28 has a lower, product-engaging face 44 which is of smoothly arcuate, concave configuration. It is to be noted that although the face 44 is arcuate in the illustrated embodiment, it is also within the concepts of the present invention to provide such face 44 with sloping flat surfaces that converge toward the passage 30. The number of such sloping surfaces is largely discretionary.
The lower takeup piston 16 is provided with an upper, product engaging face 17 that is of smoothly arcuate, convex configuration complemental to that of the face 44 of pumping piston 28. Once again, although face 17 has been disclosed herein as being smoothly arcuate, it is within the scope of the present invention to achieve its convex configuration through sloping flat surfaces or the like, although it is preferred that, in any event, the face 17 be configured in a corresponding and complemental way with respect to the face 44.
OPERATION OF THE PREFERRED EMBODIMENT
The return spring 40 normally maintains the pumping piston 28, the spout 34, and the actuator 46 in the position of FIG. 1 in which the valve flap 58 tightly covers and seals the outlet 38. Upon the application of downwardly directed finger pressure to the operating portion 56 of the actuator 46, the latter rocks downwardly about the fulcrum pins 48 in a clockwise direction so that the valve flap 58 is lifted off the outlet 38 in substantially the same manner as illustrated in FIG. 2. At the same time, because the legs 50 are retained beneath the ledges 52, depression of the operating portion 56 also causes the spout 34 and hence the pumping piston 28 to be shifted downwardly a short distance. This exerts a positive pumping pressure on the product contained within the chamber 32, forcing the same upwardly through the passages 30 and 36 and out the outlet 38.
When pressure on the operating portion 56 is released, the spring 40 returns the spout 34 to its original raised position of FIG. 1 and likewise forces the pumping piston 28 back to its original position. By virtue of the fulcrum pins 48 moving upwardly at this time and the legs 50 being trapped beneath the ledges 52, the actuator 46 is rocked in a counterclockwise direction about fulcrum pins 48 to thereby return the operating portion 56 to its original undepressed position and to lower the flap 58 once again into covering relationship with the outlet 38. In view of the evacuation of product within the chamber 32 and the closing of the outlet 38 by valve flap 58, the floating piston 16 is caused to be moved upwardly within the chamber 32 by a corresponding amount as atmospheric pressure is applied against the bottom of the piston 16 by the open lower end 14 of the body 12.
The gently arcuate, concave face 44 of the pumping piston 28 has the effect of easing the transfer of product from within the pumping chamber 32 to the spout 34. In this respect, whereas in prior dispensers the pumping face of the piston is normal to the path of travel of product therethrough and the product must therefore be converged centrally and turned sharply and abruptly at right angles, in the present invention downward movement of the pumping piston 28 tends to deflect or guide the product gently inwardly while at the same time pressing downwardly to force the product up through the passage 30.
This is quite significant when the product being dispensed has a number of axial stripes of sharply contrasting colors as illustrated in Fig. 2 where, for example, the stripes 62, 64, and 66 may be white, the stripe 68 red, and stripe 70 aqua. By converging the outer portions of the product inwardly toward the passage 30 at an oblique angle to the latter during the pumping stroke, it has been found that the stripes are much more prone to maintain their sharp, contrasting definition so that the bead of product ultimately dispensed will be aesthetically pleasing.
It has also been found that the concave configuration of the piston face 44 yields improved structural integrity as compared to prior pumping pistons having thin faces disposed normal to the path of product flow. In this respect it has been observed that the pressures developed during a pumping stroke had a tendency to deflect and deform such prior piston faces, thus also tending to pull the sealing peripheries thereof away from their interface with their pumping chamber. This could result in product blow by and leakage around the pumping piston under some conditions.
Furthermore, it has been noted that the concave configuration of the piston face 44 reduces the finger pressure required to depress the piston 28. Helpful in this regard is the lack of turbulence and agitation involved during the pumping action, all of which enhances the ease with which the piston 28 may be depressed.
On the other hand, the convex configuration of the takeup piston 16 assures that as the latter approaches the upper limits of its travel, the face 17 thereof will be complementally received by the concavity of the pumping piston 28. Consequently, evacuation of the product within chamber 32 is maximized, there being no remaining space for entrapment of product residue between the complemental faces 44 and 17 once the takeup piston 16 has fully risen into engagement with the piston 28.
Furthermore, it is believed that as a result of the convex configuration applied to the takeup piston face 17, an enhanced peripheral sealing action is obtained between takeup piston 16 and the walls of the chamber 32, perhaps as a result of product forces being directed downwardly along the domed face 17 and generally outwardly toward the sealing periphery of the piston 16.
It will of course be understood that the foregoing sets forth but one exemplary embodiment of the present invention. Various modifications within the spirit and scope of this invention will be apparent to those skilled in the art, and such modifications can obviously be made without departing from the underlying principles of the invention.

Claims (5)

I claim:
1. In a manually operated dispensing pump, the improvement comprising:
a hollow cylindrical body defining an internal product chamber;
a pumping piston at one end of the body supported for reciprocal movement through repeated strokes of limited length toward and away from the opposite end of the body,
said piston having yieldable means associated therewith for returning the piston to its original position following each dispensing stroke and having a centrally disposed, axially extending discharge passage in continuously open communication with said product chamber;
a discharge spout having an internal outlet passage of reduced diameter compared to the product chamber in continuously open communication with said discharge passage of the piston;
a take-up piston at the opposite end of the body from the pumping piston movable toward the pumping piston under the force of atmospheric pressure outside of the body and subatmospheric pressure inside of the body following each dispensing stroke of the pumping piston whereby to reduce the volume of the product chamber by an amount which corresponds to the volume of product dispensed during the immediately preceding dispensing stroke,
said take-up piston having means associated therewith for preventing retrograde movement of the take-up piston in a direction away from the pumping piston during the dispensing stroke of the pumping piston;
a viscous product mass within said product chamber containing a plurality of circumferentially spaced apart, axially extending product stripes of different colors,
said pumping piston having a smooth, concave, product-engaging face surrounding the discharge passage thereof and extending radially outwardly across the width of the product chamber for gently funneling the striped product mass laterally inwardly into and axially through said passages during movement of the pumping piston through its dispensing stroke, whereby to produce an axially striped, multi-colored bead of product emanating from the spout whose stripes are proportionately closer together and narrower than the stripes of the mass in the product chamber,
said passages of the pumping piston and the spout being devoid of internal obstructions to product flow throughout their full lengths whereby to preserve and maintain the integrity of the multi-colored stripes in the product passing through said passages; and
actuating means operably coupled with said pumping piston for operating the same.
2. In a manually operated dispensing pump as claimed in claim 1, said take-up piston having a convex product-engaging surface substantially matching the concave configuration of said face of the pumping piston.
3. In a manually operated dispensing pump as claimed in claim 1, said discharge spout having an outlet through which the striped bead of product emanates from the spout, said actuating means including an operating lever having a rigid valve flap at one end thereof operable to open the outlet during a dispensing stroke of the pumping piston and to sealingly close the outlet in the manner of a check valve upon return of the pumping piston to its original position whereby to prevent suck-back of product in the spout.
4. In a manually operated dispensing pump as claimed in claim 1, said face of the pumping piston being arcuately concave.
5. In a manually operated dispensing pump as claimed in claim 1, said discharge spout being secured to said pumping piston for reciprocation therewith.
US06/926,853 1984-07-16 1986-10-03 Dispenser for striped viscous products Expired - Lifetime US4715518A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US06/926,853 US4715518A (en) 1984-07-16 1986-10-03 Dispenser for striped viscous products

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US63125884A 1984-07-16 1984-07-16
US06/926,853 US4715518A (en) 1984-07-16 1986-10-03 Dispenser for striped viscous products

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US63125884A Continuation 1984-07-16 1984-07-16

Publications (1)

Publication Number Publication Date
US4715518A true US4715518A (en) 1987-12-29

Family

ID=27091337

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/926,853 Expired - Lifetime US4715518A (en) 1984-07-16 1986-10-03 Dispenser for striped viscous products

Country Status (1)

Country Link
US (1) US4715518A (en)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4804115A (en) * 1987-04-29 1989-02-14 Metal Box P.L.C. Pump chamber dispenser
US4936493A (en) * 1987-11-23 1990-06-26 Calmar, Inc. Elastomeric valve and piston structure for product dispenser
US4991744A (en) * 1988-02-04 1991-02-12 Colgate Palmolive Company Dispenser for the metered delivery of pasty products
US5307954A (en) * 1991-11-19 1994-05-03 Duncan Enterprises Multi-color fabric paint product
US5324505A (en) * 1988-12-12 1994-06-28 Henkel Kommanditgeselschaft Auf Aktien Striped, multicolored toothpaste and dispenser therefor
US5465873A (en) * 1992-06-12 1995-11-14 Reboul-Smt Pot for the metered dispensing of a fluid substance
WO1997005043A1 (en) * 1995-07-28 1997-02-13 Lehmkuhl Robert A Reusable dispensing system for toothpaste
US5746357A (en) * 1996-04-22 1998-05-05 Essex Specialty Products, Inc. Plunger and apparatus useful in extruding or dispensing viscous materials
US5823387A (en) * 1993-05-18 1998-10-20 Colgate-Palmolive Company Method and apparatus for simultaneously dispensing viscous materials
US5842605A (en) * 1996-07-24 1998-12-01 Lehmkuhl; Robert A. Resuable dispenser for paste, lotion and cream-like materials
USD420463S (en) * 1997-12-15 2000-02-08 Colgate-Palmolive Company Dentifrice
US6047862A (en) * 1995-04-12 2000-04-11 Smithkline Beecham P.L.C. Dispenser for dispensing viscous fluids
US6056213A (en) * 1998-01-30 2000-05-02 3M Innovative Properties Company Modular system for atomizing a liquid
US6082704A (en) * 1999-05-24 2000-07-04 Nutech Energy Systems Inc. Connection collar having an adjustable damper
US6419902B1 (en) * 1995-12-11 2002-07-16 Howard W. Wright Color changing toothpaste
US6460739B1 (en) 2001-12-13 2002-10-08 Colgate-Palmolive Company Dispenser
US20060151543A1 (en) * 2005-01-11 2006-07-13 Henkel Consumer Adhesives, Inc. Dispensable adhesive and sealants with color differentiated components
FR2911123A1 (en) * 2007-01-10 2008-07-11 Valois Sas Follower piston for e.g. pharmacy field, has anti-return units preventing displacement of piston inside shaft of fluid product tank in response to overpressure in tank, and formed with sealing lip in monoblock manner
US8528785B2 (en) 2010-11-15 2013-09-10 Milwaukee Electric Tool Corporation Powered dispensing tool
US8740021B2 (en) 2010-11-15 2014-06-03 Milwaukee Electric Tool Corporation Powered dispensing tool
US8857672B2 (en) 2011-06-20 2014-10-14 Milwaukee Electric Tool Corporation Carriage assembly for dispensing tool
US9039557B2 (en) 2011-09-02 2015-05-26 Milwaukee Electric Tool Corporation Powered dispensing tool
US20190352081A1 (en) * 2018-05-18 2019-11-21 Albea Services Piston for a reservoir of a dispenser of a fluid product without air intake

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB472508A (en) * 1935-08-09 1937-09-24 Garnet Adam Maguire Improvements in containers for paste
US2341031A (en) * 1942-08-07 1944-02-08 Vincent H Flynn Cream and paste dispenser
US2944705A (en) * 1958-04-10 1960-07-12 Regent Plastics Inc Dispenser for paste material
US3405845A (en) * 1966-12-23 1968-10-15 Products Res And Chemical Corp Gas generating dispenser
US4323175A (en) * 1979-04-19 1982-04-06 Josef Eckert Dispenser utilizing a follower and delivery device for dispensing pastes, creams, etc.
US4437584A (en) * 1981-08-28 1984-03-20 Colgate-Palmolive Company Toothpaste dispenser
US4461403A (en) * 1980-12-17 1984-07-24 Colgate-Palmolive Company Striping dispenser
US4511068A (en) * 1982-01-19 1985-04-16 Gap Gesselschaft Fuer Auswertungen Und Patente Ag Dispenser for paste-like products

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB472508A (en) * 1935-08-09 1937-09-24 Garnet Adam Maguire Improvements in containers for paste
US2341031A (en) * 1942-08-07 1944-02-08 Vincent H Flynn Cream and paste dispenser
US2944705A (en) * 1958-04-10 1960-07-12 Regent Plastics Inc Dispenser for paste material
US3405845A (en) * 1966-12-23 1968-10-15 Products Res And Chemical Corp Gas generating dispenser
US4323175A (en) * 1979-04-19 1982-04-06 Josef Eckert Dispenser utilizing a follower and delivery device for dispensing pastes, creams, etc.
US4461403A (en) * 1980-12-17 1984-07-24 Colgate-Palmolive Company Striping dispenser
US4437584A (en) * 1981-08-28 1984-03-20 Colgate-Palmolive Company Toothpaste dispenser
US4511068A (en) * 1982-01-19 1985-04-16 Gap Gesselschaft Fuer Auswertungen Und Patente Ag Dispenser for paste-like products

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4804115A (en) * 1987-04-29 1989-02-14 Metal Box P.L.C. Pump chamber dispenser
US4936493A (en) * 1987-11-23 1990-06-26 Calmar, Inc. Elastomeric valve and piston structure for product dispenser
US4991744A (en) * 1988-02-04 1991-02-12 Colgate Palmolive Company Dispenser for the metered delivery of pasty products
US5324505A (en) * 1988-12-12 1994-06-28 Henkel Kommanditgeselschaft Auf Aktien Striped, multicolored toothpaste and dispenser therefor
US5307954A (en) * 1991-11-19 1994-05-03 Duncan Enterprises Multi-color fabric paint product
US5465873A (en) * 1992-06-12 1995-11-14 Reboul-Smt Pot for the metered dispensing of a fluid substance
US5823387A (en) * 1993-05-18 1998-10-20 Colgate-Palmolive Company Method and apparatus for simultaneously dispensing viscous materials
US6047862A (en) * 1995-04-12 2000-04-11 Smithkline Beecham P.L.C. Dispenser for dispensing viscous fluids
WO1997005043A1 (en) * 1995-07-28 1997-02-13 Lehmkuhl Robert A Reusable dispensing system for toothpaste
US6419902B1 (en) * 1995-12-11 2002-07-16 Howard W. Wright Color changing toothpaste
US5746357A (en) * 1996-04-22 1998-05-05 Essex Specialty Products, Inc. Plunger and apparatus useful in extruding or dispensing viscous materials
US5842605A (en) * 1996-07-24 1998-12-01 Lehmkuhl; Robert A. Resuable dispenser for paste, lotion and cream-like materials
USD420463S (en) * 1997-12-15 2000-02-08 Colgate-Palmolive Company Dentifrice
US6056213A (en) * 1998-01-30 2000-05-02 3M Innovative Properties Company Modular system for atomizing a liquid
US6082704A (en) * 1999-05-24 2000-07-04 Nutech Energy Systems Inc. Connection collar having an adjustable damper
US6460739B1 (en) 2001-12-13 2002-10-08 Colgate-Palmolive Company Dispenser
WO2003051735A1 (en) 2001-12-13 2003-06-26 Colgate-Palmolive Company Dispenser
US20060151543A1 (en) * 2005-01-11 2006-07-13 Henkel Consumer Adhesives, Inc. Dispensable adhesive and sealants with color differentiated components
FR2911123A1 (en) * 2007-01-10 2008-07-11 Valois Sas Follower piston for e.g. pharmacy field, has anti-return units preventing displacement of piston inside shaft of fluid product tank in response to overpressure in tank, and formed with sealing lip in monoblock manner
US8740021B2 (en) 2010-11-15 2014-06-03 Milwaukee Electric Tool Corporation Powered dispensing tool
US8528785B2 (en) 2010-11-15 2013-09-10 Milwaukee Electric Tool Corporation Powered dispensing tool
US8875948B2 (en) 2010-11-15 2014-11-04 Milwaukee Electric Tool Corporation Powered dispensing tool
US9511923B2 (en) 2010-11-15 2016-12-06 Milwaukee Electric Tool Corporation Powered dispensing tool
US8857672B2 (en) 2011-06-20 2014-10-14 Milwaukee Electric Tool Corporation Carriage assembly for dispensing tool
US9039557B2 (en) 2011-09-02 2015-05-26 Milwaukee Electric Tool Corporation Powered dispensing tool
US20190352081A1 (en) * 2018-05-18 2019-11-21 Albea Services Piston for a reservoir of a dispenser of a fluid product without air intake
US11370597B2 (en) * 2018-05-18 2022-06-28 Silgan Dispensing Systems Le Treport Piston for a reservoir of a dispenser of a fluid product without air intake

Similar Documents

Publication Publication Date Title
US4715518A (en) Dispenser for striped viscous products
US4691847A (en) Pasty product dispenser having combination actuator and outlet valve
EP0737519B1 (en) Precompression pump sprayer
US3987938A (en) Dispensing pump
US4155487A (en) Trigger sprayer
CA1305949C (en) Striped product dispenser with working piston and active streamlined nozzle passageway
CA1246504A (en) Pump for dispensing liquid from a container
US4618077A (en) Liquid dispensing pump
US5301841A (en) Media discharge apparatus for housing a movable reservoir
US5000355A (en) Pump dispenser
US4890773A (en) Viscous product dispenser
JP2622795B2 (en) Liquid pump distributor
US3991914A (en) Easily assembled, leakproof liquid dispensing pump
US4046292A (en) Manual container mounted pump
CA1144119A (en) Accumulative pressure pump
US4315582A (en) Universal sequential dispensing pump system free of external check valves and having venting capability
KR20060045310A (en) Aerosol valve assembly
US4437588A (en) Accumulative pressure pump
US5850948A (en) Finger-operable pump with piston biasing post
JPH05269409A (en) Pump sprayer
GB2394941A (en) A dispensing pump for a viscous liquid
US3877617A (en) Pump with slide valve
US5108013A (en) Pump for dispensing liquid from a container
US5284276A (en) Pump dispenser with combined inlet and outlet ports
CA1085793A (en) Universal, sequential pump dispensing system

Legal Events

Date Code Title Description
STCF Information on status: patent grant

Free format text: PATENTED CASE

AS Assignment

Owner name: CALMAR INC., 40 STIRLING ROAD, WATCHUNG, NJ 07060,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:REALEX CORPORATION;REEL/FRAME:004983/0866

Effective date: 19881128

Owner name: CALMAR INC., A CORP. OF DE, NEW JERSEY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:REALEX CORPORATION;REEL/FRAME:004983/0866

Effective date: 19881128

AS Assignment

Owner name: CALMAR INC., A DE CORP., NEW JERSEY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:REALEX CORPORATION;REEL/FRAME:005020/0968

Effective date: 19881130

Owner name: CITICORP NORTH AMERICA, INC., AS AGENT, CALIFORNIA

Free format text: SECURITY INTEREST;ASSIGNOR:CALMAR INC.;REEL/FRAME:005020/0974

Effective date: 19881208

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

SULP Surcharge for late payment
AS Assignment

Owner name: UNITED STATES TRUST COMPANY OF NEW YORK, NEW YORK

Free format text: SECURITY INTEREST;ASSIGNOR:CALMAR INC.;REEL/FRAME:006608/0452

Effective date: 19911223

AS Assignment

Owner name: CALMAR INC., A CORPORATION OF DELAWARE, CALIFORNIA

Free format text: RELEASE BY SECURED PARTY OF A SECURITY AGREEMENT RECORDED AT REEL 5020 FRAME 0974 AND DATED 12-08-88;ASSIGNOR:CITICORP NORTH AMERICA, INC.;REEL/FRAME:006082/0535

Effective date: 19911212

REFU Refund

Free format text: REFUND OF EXCESS PAYMENTS PROCESSED (ORIGINAL EVENT CODE: R169); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 8

AS Assignment

Owner name: CALMAR INC., A DE CORP., CALIFORNIA

Free format text: TERMINATION AND RELEASE OF INTELLECTUAL PROPERTY PLEDGE AGREEMENT;ASSIGNOR:UNITED STATES TRUST COMPANY OF NEW YORK, AS COLLATERAL AGENT;REEL/FRAME:007648/0338

Effective date: 19950918

Owner name: MELLON BANK, N.A., AS COLLATERAL AGENT, PENNSYLVAN

Free format text: PATENT COLLATERAL SECURITY AGREEMENT;ASSIGNOR:CALMAR INC., A DELAWARE CORPORATION;REEL/FRAME:007662/0551

Effective date: 19950918

AS Assignment

Owner name: BANQUE INDOSUEZ, AS COLLATERAL AGENT, NEW YORK

Free format text: SECURITY INTEREST;ASSIGNOR:MELLON BANK, N.A., AS COLLATERAL AGENT;REEL/FRAME:008186/0912

Effective date: 19961025

AS Assignment

Owner name: CALMAR, INC., CALIFORNIA

Free format text: TERMINATION OF PATENT SECURITY INTERESTS;ASSIGNOR:BANQUE INDOSUEZ, AS COLLATERAL AGENT;REEL/FRAME:009375/0018

Effective date: 19980722

FPAY Fee payment

Year of fee payment: 12